Geissele Super 42 Receiver Damage

[jerrysimons]

That's where I'm at.

What forces cause this?

Unlocking during high chamber pressure pushes the bolt back faster than the carrier?

Doesn't the expansion chamber inside the bolt carrier actually push the bolt forward at the boat tail until the gas vents out of the carrier and the cam pin unlocks the bolt as the carrier moves rearward until finally the the bolt is fully unlocked and starts to rearward with the carrier?

[MistWolf]

Yes, the pressure in the expansion chamber pushes forward against the piston (tail of the bolt). But since the bolt is locked mechanically, the bolt cannot move until the slot in the carrier turns the cam pin and unlocks the bolt. So, the pressure moves the cylinder (carrier) rearward instead

[Iraqgunz]

I missed the Geissele part since it wasn't in the OP and I simply scrolled through the others.

When you have a system that works perfectly and you change one thing and the system no longer works perfectly you can logically assume that the thing you changed (the Super 42) is the cause of the issue so the title stands as is.

I did contact Geissele (as I eluded to in an earlier post) and they essentially shrugged their shoulders and said I should put a heavier buffer in. The question is why switching from a standard H2 buffer and spring to the Geissele H2 buffer and spring caused bolt bounce and associated receiver damage. For lack of any other explanation so far I can assume that the Geissele spring and buffer are not up to spec. Or am I completely wrong?

[vicious_cb]

If you look at mr guns and gear's meltdown videos the geissele spring and do a poor job at slowing things down. I would go the proven route of an A5 system. If that's not possible a springco blue + H2 is the next best choice.

[sugerwater]

I needed a H buffer and went with the super 42 on sale. Only a little over 500 rds through this set-up, all looks normal.

[tehpwnag3]

Honestly, I've never owned an AR that didn't have that same wear to some degree. Yours may be a little more aggressive than most, but I personally wouldn't bat an eye at it.

[panzerr]

Honestly, I've never owned an AR that didn't have that same wear to some degree. Yours may be a little more aggressive than most, but I personally wouldn't bat an eye at it.

I've had one LMT, a half a dozen Noveskes and one BCM and out of all of them I've never had cam pin wear until now. This is a first, so I'm not too happy about Geissele's screw up (sending me a steel weight instead of tungsten) dinging the shit out of my upper, despite the fact that it functionally doesn't matter once the correct buffer is put in.

[panzerr]

What did Geissele say about the mistaken weight?

Geissele said they will be sending me an actual tungsten weight and asked that I return the steel weight to them.

[dmd08]

I've had one LMT, a half a dozen Noveskes and one BCM and out of all of them I've never had cam pin wear until now. This is a first, so I'm not too happy about Geissele's screw up (sending me a steel weight instead of tungsten) dinging the shit out of my upper, despite the fact that it functionally doesn't matter once the correct buffer is put in.

I think you're taking this too hard. I just checked 8 different rifles in various configurations from 10.5" sbr to a 20" precision build. A mixture of BCM, Sionics, PSA and home builds. Every one of them had some degree of wear on the upper recever from the cam pin. The ones I run suppressed are much more apparent but all had some. I haven't given it a second thought since I closed the safe.

I find the sudden damage from a single swapped buffer weight to be hard to believe.

[panzerr]

I think you're taking this too hard. I just checked 8 different rifles in various configurations from 10.5" sbr to a 20" precision build. A mixture of BCM, Sionics, PSA and home builds. Every one of them had some degree of wear on the upper recever from the cam pin. The ones I run suppressed are much more apparent but all had some. I haven't given it a second thought since I closed the safe.

Honestly, I don't care about what standards you hold your weapons to. What's more is when I buy a product, I expect it to be what I purchased.

I find the sudden damage from a single swapped buffer weight to be hard to believe.

I suppose if you have a safe full of over-gased and under buffered weapons I could see how a weapon with no wear would be unusual.